-LRB- CNN -RRB- -- In anticipation of more flooding next week , residents of Fargo , North Dakota , began stacking sandbags Wednesday for the second time in just over two weeks along the banks of the Red River .

A trucker relaxes April 1 on sandbag pallets in Fargo , North Dakota , which is preparing for more flooding .

They hoped to fill 1 million , said Fargo spokeswoman Karena Lunday .

`` If we get a million , that will be a total of 4 million we 've made since the flood started , '' she said .

The first sandbag effort began about March 23 . The Red River crested at nearly 41 feet at Fargo on March 28 , breaking a record that had held since 1897 , when the Red River reached 40.1 feet .

The National Weather Service issued a flood warning Tuesday , predicting that melting snow -- and possibly rain -- will start to raise river levels on the Red River south of Oslo , Minnesota , this week .

Lunday said forecasters expected the river to crest there between April 16-18 , possibly reaching 35 feet on April 14 .

`` I do n't think people are as worried as they were the last time , but the possibility of getting up to 40 feet is a concern , '' Lunday told CNN .

The Red River meanders along the border between North Dakota and Minnesota , so many other cities also were bracing for flooding .

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Fargo spokeswoman says city has goal of filling 1 million more sandbags

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`` I do n't think people are as worried '' as they were in late March , she says

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National Weather Service issued flood warning due to precipitation forecast